I suppose if two balrogs play eachother, they might end up without troll leaders after the draft, since they all want Ummi/Bummi and can't include lieutenants and might forget about Troll-chief. Anyway, everything in Balrog is just a bit stronger
But I like your version, just that it's such a little change from the original, maybe it should belong better as a line on another (or this) card.
If you take the +5, influence vs. character and faction (which is already not hard) will be easier also. Influence vs. item has less severe effect I suppose.
Yes automatic is harsh. How about:
Orders from Lugburz V: short-event
Playable on an influence attempt by a leader against a minion opponent's item or character (if you reveal a copy). The influence attempt is automatically succesful. Opponent may cancel this attempt by discarding (for no effect) Orders from Lugburz or a command card from hand or this company.
Whoever plays the Lugburz card more convincingly, wins.

And, it might be a way to get rid of I'll Report You's.
Stone-age did not end because man ran out of rocks.